Pettersen had six runner-up finishes last year and 14 top-10 finishes in 21 events.

“It all boils down to winning tournaments, so if you judge your season by winning, last year was a disappointment,” she said.

“Winning is what it’s about,” she added.

No surprise then that she shrugged off the fatigue for the final, even though she likened the six rounds of matches to a return to qualifying school.

FRIENDLY RIVALRY

What made it harder, she noted, was that her matches came against her friends on the tour in a format that’s somehow more personal than stroke play.

“I dug deep for this one,” she said.

Kerr missed some chances to at least pressure Pettersen. She missed four putts from inside 10 feet, all to win holes.

She did make a three-footer to save par and extend the match at 16 and then she made a 10-footer for birdie at 17 to trim Pettersen’s lead.

Earlier on Sunday, Pettersen defeated top seed Choi Na-yeon of South Korea 4-and-2 in the semi-finals.

Kerr won the last two holes to defeat fellow American Angela Stanford 1-up in the semi-finals.

In the consolation match, Choi defeated Stanford 4-and-3.

TITLE MATCH

In the title match, Pettersen seized a 2-up lead with birdies at the second and fourth holes. Kerr squared the match with birdies at the fifth and eighth, before Pettersen made a 15-footer at the ninth to take a 1-up lead.

Kerr’s 10-footer at the 10th lipped out and they halved the 11th and 12th with bogeys.

Pettersen missed a five-footer that would have won the 11th and Kerr missed from four feet at the next.

Kerr had another chance to square the contest at 14, but her 10-foot attempt slid by the edge.

Pettersen went 2-up at 15, where Kerr’s approach was right and she chipped 10 feet past and couldn’t make her putt.

“Putting on the back nine killed me,” Kerr said.

“The putts that I missed, I hit bad putts. They weren’t like mishits. They were shoves. They were pushed,” she added.